Help with bluetooth...

**dhouston** · - 7th October 2009, 04:38

Originally Posted by mbox

I tried that but it gives character sysmbols..pls see the attachment.

I'm confused. Your code example comment says "PortC.6 as Transmit pin to pc com1" but your latest schematic appears to indicate another wireless connection to the PC.

A wired RS232 connection needs N9600 for SerOut while a wireless connection may use T9600. A wireless connection may also be noisy, leading to the random data of your first example.

**mbox** · - 7th October 2009, 08:06

Hi, sorry if it is confusing. I forgot to tell you that I'm using my mobile to send data to the bluetooth module and hopefully have it echoed to the Pc. My code for my phone is tested, it can send letter 'A' from phone to Pc thru bluetooth communication. And hoping it will the same way to pic with a bluetooth module. So this noise is normal? How can I prevent it from generating. I tried to observe while sending from my phone to pic if 65 is recieved, unfortunately it is not.

Code:

 IF B2 = 65 then  ' waits for "A"
           If PortB.1 = 0 then
	 High PortB.1 
           else
              Low PortB.1
           Endif 

           else
           	            
Endif

**dhouston** · - 7th October 2009, 12:04

It may just be that your schematic is what confused me. I'm not familiar with Bluetooth serial adapters but would expect them to handle the noise suppression automatically.

Try this:

Code:

start:  SerIn PortB.0,T9600,["A"] 		'wait for "A" on PortB.0
	If PortB.1 = 0 Then
	  SerOut PORTC.6,N9600,["HIGH",13,10]
	  High PortB.1 
        Else
          Serout PORTC.6,N9600,["LOW",13,10]
          Low PortB.1
        Endif             	            
	GoTo start

**mbox** · - 7th October 2009, 12:51

I tried using the code but I got character symbols coming out.
I tried to make them all T9600 and I got High and Low display...and I'm not even sending any data yet to the module..

**dhouston** · - 7th October 2009, 14:47

Try

Code:

SerIn PortB.0,T9600,["ABC"]

**mbox** · - 7th October 2009, 23:03

Hi there,

SerIn PortB.0,T9600,["ABC"]

No random generation, I then try to send "ABC" but nothing happen.
I think somethings wrong with my bluetoooth and pic setup.
I checked the supply its getting only 2.9 instead of 3.3v. I'm going to get IC regulator 3.3v and try to redo the setup...and let you know what happen.

**dhouston** · - 8th October 2009, 00:44

It would be helpful to know whether the output from the BT module is noisy. If you do not have an oscilloscope, you can record it as a .WAV file using the LineIn of your soundcard.